Lunch

Bryan District Average Construction Cost

• Grade Separation– $ 10 Million

• 2 Lane to 4 Lane– $ 2.3 Million/ Mile

• 2 Lane to Super 2 (passing zones)– $ 1 Million/ Mile

• Signal– $ 100,000

• Freeway – Controlled Access– $ 10 Million/ Mile

Programming - Strategies

• Gather data from similar projects– Cost/ mile equivalents

• Original plans• TxDOT’s – Roadway Design Manual• “Green Book” (Policy on Geometric Design of Highways

and Streets• TxDOT’s – Bridge Design Manual• Site visit

– note existing structures– consider topography

• Bid tabs and Estimator

General Estimate

– Prepare ROW (Item 100)– Pavement– Structures

• Bridges• Culverts/ Inlets/ Storm sewer

– Items 462 through 466

• Retaining walls– Item 423

– Embankment/ Excavation (Item 132/110)– Signals– Contingency (15-20% subtotal 1)– Mobilization (10% subtotal 2)

Items• ftp://ftp.dot.state.tx.us/pub/txdot-info/des/sp

ecs/specbook.pdf (2004 Spec Book)

• http://www.dot.state.tx.us/business/avgd.htm (state wide and region specific)

• http://www.dot.state.tx.us/insdtdot/geodist/bry/cserve/bidprice/s_0101.htm (Bryan District Low Bid)

Pavement

• Main lane– $90/ SY (Flexible)

• Frontage/ Ramps– $65/ SY (Flexible)

• Urban Arterial– $80/ SY (Rigid)

Structures(400 Items)

• Culverts (Item 462)

• Reinforced Concrete Pipe (Item 464)

• Inlets/ Manholes (Item 465)

• Headwalls/ Wingwall (Item 466)

• Safety End Treatment (Item 467)

• Retaining Walls (Item 423)

Estimating Bridge Type

http://www.txdot.gov/business/contractors_consultants/bridge/super_design.htm

Bridge Design Manual Chapters 4 & 5

Bryan District Tx Girder Structure = $75/(sq. ft)

Bryan District AverageTx Girder = 75/$SF

Estimator supports generation of cost estimates using cost-based and bid-based techniques. Regional

information

Accounts for quantity

• http://www.dot.state.tx.us/business/projects/estimator.htm

Wow! what a great program… but where can I get a copy?

Construction Cost = $ 5.9 Million

Construction Bid = $ 20 Million

Estimate = $23.3 Million